| /* |
| * GStreamer |
| * Copyright (C) 2015 Matthew Waters <matthew@centricular.com> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <gst/video/videooverlay.h> |
| #include <gst/video/navigation.h> |
| |
| #include "gstglsinkbin.h" |
| |
| GST_DEBUG_CATEGORY (gst_debug_gl_sink_bin); |
| #define GST_CAT_DEFAULT gst_debug_gl_sink_bin |
| |
| static void gst_gl_sink_bin_set_property (GObject * object, guint prop_id, |
| const GValue * value, GParamSpec * param_spec); |
| static void gst_gl_sink_bin_get_property (GObject * object, guint prop_id, |
| GValue * value, GParamSpec * param_spec); |
| |
| static GstStateChangeReturn gst_gl_sink_bin_change_state (GstElement * element, |
| GstStateChange transition); |
| |
| static void gst_gl_sink_bin_video_overlay_init (gpointer g_iface, |
| gpointer g_iface_data); |
| static void gst_gl_sink_bin_navigation_interface_init (gpointer g_iface, |
| gpointer g_iface_data); |
| |
| enum |
| { |
| PROP_0, |
| PROP_FORCE_ASPECT_RATIO, |
| PROP_SINK, |
| }; |
| |
| enum |
| { |
| SIGNAL_0, |
| SIGNAL_CREATE_ELEMENT, |
| SIGNAL_LAST, |
| }; |
| |
| static guint gst_gl_sink_bin_signals[SIGNAL_LAST] = { 0, }; |
| |
| #define gst_gl_sink_bin_parent_class parent_class |
| G_DEFINE_TYPE_WITH_CODE (GstGLSinkBin, gst_gl_sink_bin, |
| GST_TYPE_BIN, G_IMPLEMENT_INTERFACE (GST_TYPE_VIDEO_OVERLAY, |
| gst_gl_sink_bin_video_overlay_init); |
| G_IMPLEMENT_INTERFACE (GST_TYPE_NAVIGATION, |
| gst_gl_sink_bin_navigation_interface_init); |
| GST_DEBUG_CATEGORY_INIT (gst_debug_gl_sink_bin, "glimagesink", 0, |
| "OpenGL Video Sink Bin")); |
| |
| static void |
| gst_gl_sink_bin_class_init (GstGLSinkBinClass * klass) |
| { |
| GObjectClass *gobject_class; |
| GstElementClass *element_class; |
| GstCaps *upload_caps; |
| |
| gobject_class = (GObjectClass *) klass; |
| element_class = GST_ELEMENT_CLASS (klass); |
| |
| element_class->change_state = gst_gl_sink_bin_change_state; |
| |
| gobject_class->set_property = gst_gl_sink_bin_set_property; |
| gobject_class->get_property = gst_gl_sink_bin_get_property; |
| |
| g_object_class_install_property (gobject_class, PROP_FORCE_ASPECT_RATIO, |
| g_param_spec_boolean ("force-aspect-ratio", |
| "Force aspect ratio", |
| "When enabled, scaling will respect original aspect ratio", TRUE, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (gobject_class, PROP_SINK, |
| g_param_spec_object ("sink", |
| "GL sink element", |
| "The GL sink chain to use", |
| GST_TYPE_ELEMENT, |
| GST_PARAM_MUTABLE_READY | G_PARAM_READWRITE | |
| G_PARAM_STATIC_STRINGS)); |
| |
| /** |
| * GstGLSinkBin::create-element: |
| * @object: the #GstGLSinkBin |
| * |
| * Will be emitted when we need the processing element/s that this bin will use |
| * |
| * Returns: a new #GstElement |
| */ |
| gst_gl_sink_bin_signals[SIGNAL_CREATE_ELEMENT] = |
| g_signal_new ("create-element", G_TYPE_FROM_CLASS (klass), |
| G_SIGNAL_RUN_LAST, 0, NULL, NULL, g_cclosure_marshal_generic, |
| GST_TYPE_ELEMENT, 0); |
| |
| gst_element_class_set_metadata (element_class, |
| "GL Sink Bin", "Sink/Video", |
| "Infrastructure to process GL textures", |
| "Matthew Waters <matthew@centricular.com>"); |
| |
| upload_caps = gst_gl_upload_get_input_template_caps (); |
| gst_element_class_add_pad_template (element_class, |
| gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, upload_caps)); |
| gst_caps_unref (upload_caps); |
| } |
| |
| static void |
| gst_gl_sink_bin_init (GstGLSinkBin * self) |
| { |
| gboolean res = TRUE; |
| GstPad *pad; |
| |
| self->upload = gst_element_factory_make ("glupload", NULL); |
| self->convert = gst_element_factory_make ("glcolorconvert", NULL); |
| |
| res &= gst_bin_add (GST_BIN (self), self->upload); |
| res &= gst_bin_add (GST_BIN (self), self->convert); |
| |
| res &= gst_element_link_pads (self->upload, "src", self->convert, "sink"); |
| |
| pad = gst_element_get_static_pad (self->upload, "sink"); |
| if (!pad) { |
| res = FALSE; |
| } else { |
| GST_DEBUG_OBJECT (self, "setting target sink pad %" GST_PTR_FORMAT, pad); |
| self->sinkpad = gst_ghost_pad_new ("sink", pad); |
| gst_element_add_pad (GST_ELEMENT_CAST (self), self->sinkpad); |
| gst_object_unref (pad); |
| } |
| |
| if (!res) { |
| GST_WARNING_OBJECT (self, "Failed to add/connect the necessary machinery"); |
| } |
| } |
| |
| static gboolean |
| _connect_sink_element (GstGLSinkBin * self) |
| { |
| gboolean res = TRUE; |
| |
| gst_object_set_name (GST_OBJECT (self->sink), "sink"); |
| res &= gst_bin_add (GST_BIN (self), self->sink); |
| |
| res &= gst_element_link_pads (self->convert, "src", self->sink, "sink"); |
| |
| if (!res) |
| GST_ERROR_OBJECT (self, "Failed to link sink element into the pipeline"); |
| |
| return res; |
| } |
| |
| void |
| gst_gl_sink_bin_finish_init_with_element (GstGLSinkBin * self, |
| GstElement * element) |
| { |
| g_return_if_fail (GST_IS_ELEMENT (element)); |
| |
| self->sink = element; |
| |
| if (!_connect_sink_element (self)) { |
| gst_object_unref (self->sink); |
| self->sink = NULL; |
| } |
| } |
| |
| void |
| gst_gl_sink_bin_finish_init (GstGLSinkBin * self) |
| { |
| GstGLSinkBinClass *klass = GST_GL_SINK_BIN_GET_CLASS (self); |
| GstElement *element = NULL; |
| |
| if (klass->create_element) |
| element = klass->create_element (); |
| |
| if (element) |
| gst_gl_sink_bin_finish_init_with_element (self, element); |
| } |
| |
| static void |
| gst_gl_sink_bin_set_property (GObject * object, guint prop_id, |
| const GValue * value, GParamSpec * pspec) |
| { |
| GstGLSinkBin *self = GST_GL_SINK_BIN (object); |
| |
| switch (prop_id) { |
| case PROP_SINK: |
| { |
| GstElement *sink = g_value_get_object (value); |
| if (self->sink) |
| gst_bin_remove (GST_BIN (self), self->sink); |
| self->sink = sink; |
| if (sink) |
| _connect_sink_element (self); |
| break; |
| } |
| case PROP_FORCE_ASPECT_RATIO: |
| if (self->sink) |
| g_object_set_property (G_OBJECT (self->sink), pspec->name, value); |
| break; |
| default: |
| G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
| break; |
| } |
| } |
| |
| static void |
| gst_gl_sink_bin_get_property (GObject * object, guint prop_id, |
| GValue * value, GParamSpec * pspec) |
| { |
| GstGLSinkBin *self = GST_GL_SINK_BIN (object); |
| |
| switch (prop_id) { |
| case PROP_SINK: |
| g_value_set_object (value, self->sink); |
| break; |
| case PROP_FORCE_ASPECT_RATIO: |
| if (self->sink) |
| g_object_get_property (G_OBJECT (self->sink), pspec->name, value); |
| break; |
| default: |
| G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
| break; |
| } |
| } |
| |
| static GstStateChangeReturn |
| gst_gl_sink_bin_change_state (GstElement * element, GstStateChange transition) |
| { |
| GstGLSinkBin *self = GST_GL_SINK_BIN (element); |
| GstGLSinkBinClass *klass = GST_GL_SINK_BIN_GET_CLASS (self); |
| GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS; |
| |
| GST_DEBUG ("changing state: %s => %s", |
| gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)), |
| gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition))); |
| |
| switch (transition) { |
| case GST_STATE_CHANGE_NULL_TO_READY: |
| if (!self->sink) { |
| if (klass->create_element) |
| self->sink = klass->create_element (); |
| |
| if (!self->sink) |
| g_signal_emit (element, |
| gst_gl_sink_bin_signals[SIGNAL_CREATE_ELEMENT], 0, &self->sink); |
| |
| if (!self->sink) { |
| GST_ERROR_OBJECT (element, "Failed to retreive element"); |
| return GST_STATE_CHANGE_FAILURE; |
| } |
| if (!_connect_sink_element (self)) |
| return GST_STATE_CHANGE_FAILURE; |
| } |
| break; |
| default: |
| break; |
| } |
| |
| ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); |
| if (ret == GST_STATE_CHANGE_FAILURE) |
| return ret; |
| |
| switch (transition) { |
| default: |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static void |
| gst_gl_sink_bin_navigation_send_event (GstNavigation * navigation, GstStructure |
| * structure) |
| { |
| GstGLSinkBin *self = GST_GL_SINK_BIN (navigation); |
| GstElement *nav = |
| gst_bin_get_by_interface (GST_BIN (self), GST_TYPE_NAVIGATION); |
| |
| if (nav) { |
| gst_navigation_send_event (GST_NAVIGATION (nav), structure); |
| structure = NULL; |
| gst_object_unref (nav); |
| } else { |
| GstEvent *event = gst_event_new_navigation (structure); |
| structure = NULL; |
| gst_element_send_event (GST_ELEMENT (self), event); |
| } |
| } |
| |
| static void |
| gst_gl_sink_bin_navigation_interface_init (gpointer g_iface, |
| gpointer g_iface_data) |
| { |
| GstNavigationInterface *iface = (GstNavigationInterface *) g_iface; |
| iface->send_event = gst_gl_sink_bin_navigation_send_event; |
| } |
| |
| static void |
| gst_gl_sink_bin_overlay_expose (GstVideoOverlay * overlay) |
| { |
| GstGLSinkBin *self = GST_GL_SINK_BIN (overlay); |
| GstVideoOverlay *overlay_element = NULL; |
| |
| overlay_element = |
| GST_VIDEO_OVERLAY (gst_bin_get_by_interface (GST_BIN (self), |
| GST_TYPE_VIDEO_OVERLAY)); |
| |
| if (overlay_element) { |
| gst_video_overlay_expose (overlay_element); |
| gst_object_unref (overlay_element); |
| } |
| } |
| |
| static void |
| gst_gl_sink_bin_overlay_handle_events (GstVideoOverlay * overlay, |
| gboolean handle_events) |
| { |
| GstGLSinkBin *self = GST_GL_SINK_BIN (overlay); |
| GstVideoOverlay *overlay_element = NULL; |
| |
| overlay_element = |
| GST_VIDEO_OVERLAY (gst_bin_get_by_interface (GST_BIN (self), |
| GST_TYPE_VIDEO_OVERLAY)); |
| |
| if (overlay_element) { |
| gst_video_overlay_handle_events (overlay_element, handle_events); |
| gst_object_unref (overlay_element); |
| } |
| } |
| |
| static void |
| gst_gl_sink_bin_overlay_set_render_rectangle (GstVideoOverlay * overlay, gint x, |
| gint y, gint width, gint height) |
| { |
| GstGLSinkBin *self = GST_GL_SINK_BIN (overlay); |
| GstVideoOverlay *overlay_element = NULL; |
| |
| overlay_element = |
| GST_VIDEO_OVERLAY (gst_bin_get_by_interface (GST_BIN (self), |
| GST_TYPE_VIDEO_OVERLAY)); |
| |
| if (overlay_element) { |
| gst_video_overlay_set_render_rectangle (overlay_element, x, y, width, |
| height); |
| gst_object_unref (overlay_element); |
| } |
| } |
| |
| static void |
| gst_gl_sink_bin_overlay_set_window_handle (GstVideoOverlay * overlay, |
| guintptr handle) |
| { |
| GstGLSinkBin *self = GST_GL_SINK_BIN (overlay); |
| GstVideoOverlay *overlay_element = NULL; |
| |
| overlay_element = |
| GST_VIDEO_OVERLAY (gst_bin_get_by_interface (GST_BIN (self), |
| GST_TYPE_VIDEO_OVERLAY)); |
| |
| if (overlay_element) { |
| gst_video_overlay_set_window_handle (overlay_element, handle); |
| gst_object_unref (overlay_element); |
| } |
| } |
| |
| static void |
| gst_gl_sink_bin_video_overlay_init (gpointer g_iface, gpointer g_iface_data) |
| { |
| GstVideoOverlayInterface *iface = (GstVideoOverlayInterface *) g_iface; |
| iface->expose = gst_gl_sink_bin_overlay_expose; |
| iface->handle_events = gst_gl_sink_bin_overlay_handle_events; |
| iface->set_render_rectangle = gst_gl_sink_bin_overlay_set_render_rectangle; |
| iface->set_window_handle = gst_gl_sink_bin_overlay_set_window_handle; |
| } |